Yes I know that we can all get the urge to make an entire profile on our characters to get a better knowledge of them, because if its all in your mind, it can get all lost.
So I tracked some layout down, and I found this rather long but helpful profile layout.
Hopefully your computer/laptop isn't having a bad day and won't let me copy more than two paragraphs.
When you see how much I had to type, pitty me

Realistic fiction, although untrue, could actually happen. Some events, people, and places may even be real. Also, it can be possible that in the future these events could physically happen. For example, Jules Verne's From The Earth To The Moon novel, which at that time was just a product of a rich imagination, was proven possible in 1969, when Neil Armstrong and Buzz Aldrin set foot on the moon, and the team returned safely to Earth. Realist fiction appears to the reader to be something that is actually happening.